This is where the harmonic balancer comes in. The circular device, made of rubber and metal, is bolted at the front end of the crankshaft to help absorb vibrations. It's usually connected to the crank pulley, which drives accessories like the air conditioner.
Additional costs: Ground water wells can also be tested for radon, then, if needed, can get a water radon mitigation system installed. Installing a water radon mitigation system runs from $1,000-$4,500, and maintenance runs $0 to $150 annually.
1 On average, mitigation by a professional can cost anywhere from $650 to $1,900. 2  One of the most common methods or ridding a home of radon is by installing a radon mitigation system; this keeps a constant reading as well as reduces the radon in the air.3  A system can cost upwards of $650 to $2,100. On average, mitigation by a professional can cost anywhere from $650 to $1,900. 2  One of the most common methods or ridding a home of radon is by installing a radon mitigation system; this keeps a constant reading as well as reduces the radon in the air.